Oakley Sound Systems MOTM SuperLadder-4 Filter


  • In 1
    controls the level of input 1
  • In 2
    controls the level of input 2
  • In 3
    controls the level of input 3
  • Frequency
    controls the cutoff frequency of the filters
  • Exp CV
    controls how much the Exp CV influences the cutoff frequency of the filter.
  • Resonance
    controls the resonance of the filters
  • Res CV
    controls how much the Resonance CV influences the resonance of the filter
  • Envelope
    controls how much the envelope influences the cutoff frequency of the filter. Turning the pot fully anti clockwise produces an inverted sweep. The middle position produces no sweep, and fully clockwise produces the usual positive going sweep.
  • Env Mod CV
    Controls the depth of the envelope sweep.
  • Variable Slope
    can smoothly slide from the one pole low pass through band pass and on to the four pole low pass.
  • Lin CV


  • In 1
    Audio input 1.
  • In 2
    Audio input 2.
  • In 3
    Audio input 3.
  • Variable
  • One Pole
  • Four Pole
  • 1 V/Oct
  • Exp CV
    Exponential CV
  • Lin CV
    Linear CV
  • Res CV
    resonance control
  • Env
    Envelope amount (and direction) control
  • Env Mod
    Envelope modulation control


Oakley Sound

The SuperLadder is the ultimate voltage controlled filter system. Cut-off frequency, resonance and envelope sweep depth are all voltage controlled. Based around the old classic the ladder filter, the SuperLadder is the complete filter section for a modular or standalone synth project.

  • The VCF may be built as a moog ladder or a TB303 diode ladder. Thus with the same PCB, you could make either a classic warm filter or a rather crude squelchier affair. Simply by fitting different links and a few component changes.
  • The module has as standard two low pass outputs; the traditional four pole output, and the one pole output. This gives a sharper edge to your sounds.
  • The module has a variable shape output. The SuperLadder incorporates a feature first seen on the Orbital prototypes. A pot gives you an output that can be varied from one pole to four pole, via band pass in the middle. Band pass with moog warmth.
  • All the outputs are Q compensated. This means that the output volume will not drop significantly when you turn up the resonance pot. This design uses two VCAs to achieve voltage controlled resonance without the hassle. A beautiful sound.

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